• return surge, potentially damaging overvoltage, often occurring when power returns at the end of a blackout.
48+ Brown Out Protection Circuit. It seems a high enough false power source applied directly to a gpio. Brownout is an important safety feature in electronics and microcontrollers.
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Please refer the application circuit on page 5: Does your system have a brown out detector (bod)? 0, 9/2011 2 freescale semiconductor, inc.
What causes brownouts, and why do blackouts happen?
At first glance, it is sufficient to turn the power on to make the microcontroller operate. Reduced voltages can bring control signals below the threshold at which logic circuits can reliably detect which state is being represented. Sometimes, when esp32 reports brownout, it can take a little longer to start (from standard 1 second up to 5 seconds max). • 28 v vcc overvoltage protection.
